Chapter 9 - Nail Structure and Growth

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9-12 months

If a toenail is lost through injury, how long will it take for replacement?

4-6

If the matrix remains healthy, a nail lost through injury will be replaced in about how many months?

1/10 inches per month

The average rate of growth of fingernails in normal adults is what?

Nail bed

The blood vessels that provide nourishment for growth of the nail are found where?

Cuticle

The dead tissue that tightly adheres to the natural nail plate is the what?

Free edge

The end portion of the nail plate that reaches over the fingertip is called the what?

Nail plate

The hardened keratin structure covering the nail bed is the what?

Eponychium

The living skin at the base of the natural nail plate that covers the matrix area is known as the what?

Nail plate

The most visible and functional part of the nail unit is called the what?

100

The nail plate is constructed of approximately how many layers of nail cells?

Nail fold

The skin that surrounds the nail plate is known as the what?

Ligament

The tough bank of fibrous tissue that holds an organ in place consists of what?

Flexibility

The water content of a nail directly affects the nail's what?

15-25%

The water content of the nail is between what percent

Lunula

The whitish, half-moon shape at the base of the nail is known as the what?

Onyx

What is the technical term for the natural nail?

Bed epithelium

What is the thin layer of tissue that attaches the nail plate and the nail bed?

Middle finger

Which nail grows the fastest?

Thumb

Which nail grows the slowest?

Cuticle, eponychium, perionychium, ligaments, and nail folds

The nail consists of basic parts, which are in the nail bed, matrix, nail plate, and...


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